E310 - Container has no children

Cause

A container element's child array is empty. An empty container renders nothing and usually indicates an authoring mistake (e.g. an include that resolved to the wrong file).

Example

{ container: [], position: [0, 5], width: 100, height: 15 }

How to fix

Add at least one child element to the container array (or to the file referenced by container_file), or remove the container.